High-barrier nano organic montmorillonite-polyethylene glycol terephthalate composite material and method for preparing same

A polyethylene terephthalate, nano-organic technology, which is applied in the field of high-barrier nano-organic montmorillonite-polyethylene terephthalate composite material and its preparation field, can solve the problem of nano-organic montmorillonite The orientation cannot be regulated, it is difficult to realize industrialized production, and the process route is complex.

Inactive Publication Date: 2016-08-24
GUIZHOU MATERIAL IND TECH INSTITUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the process route of the above-mentioned preparation method is extremely complicated, the economic benefit is not high, and it is difficult to realize industrialized production
Chinese patent CN201110307066 discloses a method for preparing barrier polyethylene terephthalate-organic intercalated montmorillonite composite materials by a two-step method of melt intercalation, but The glycol ester matrix is ​​mainly intercalated and dispersed, and the orientation of nano-organic montmorillonite cannot be adjusted, which limits the improvement of barrier properties.

Method used

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  • High-barrier nano organic montmorillonite-polyethylene glycol terephthalate composite material and method for preparing same
  • High-barrier nano organic montmorillonite-polyethylene glycol terephthalate composite material and method for preparing same

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Embodiment 1

[0018] Embodiment 1 of the present invention: high-barrier nano-organic montmorillonite-polyethylene terephthalate composite material, calculated in parts by mass, including 100 parts of polyethylene terephthalate matrix resin and layers 2 parts of nano-organic montmorillonite; the polyethylene terephthalate has an intrinsic viscosity of 0.75-0.85 dl / g and a density of 1.4±0.01 g / cm 3 .

[0019] The preparation method of high-barrier nano-organic montmorillonite-polyethylene terephthalate composite material comprises the steps of:

[0020] 1) Dry polyethylene terephthalate in a drying tank at 120°C for 1 hour, then increase the temperature of the drying tank to 150°C, and dry for 5 hours; Drying for 24 hours to obtain dry raw material components;

[0021] 2) Premix the dried raw material components obtained in step 1) to obtain a premix;

[0022] 3) Put the premix obtained in step 2) into a co-rotating parallel twin-screw extruder for melt blending and extrusion, and the me...

Embodiment 2

[0023] Embodiment 2 of the present invention: high-barrier nano-organic montmorillonite-polyethylene terephthalate composite material, calculated in parts by mass, including 100 parts of polyethylene terephthalate matrix resin, ply 2 parts of nano-organic montmorillonite and 8 parts of compatibilizer; the polyethylene terephthalate has an intrinsic viscosity of 0.75-0.85 dl / g and a density of 1.4±0.01 g / cm 3 ; The compatibilizer is maleic anhydride grafted polyethylene.

[0024] The preparation method is the same as in Example 1.

Embodiment 3

[0025] Embodiment 3 of the present invention: high-barrier nano-organic montmorillonite-polyethylene terephthalate composite material, calculated in parts by mass, including 100 parts of polyethylene terephthalate matrix resin, ply 2 parts of nano-organic montmorillonite and 8 parts of compatibilizer; the polyethylene terephthalate has an intrinsic viscosity of 0.75-0.85 dl / g and a density of 1.4±0.01 g / cm 3 ; The compatibilizer is ethylene-methacrylic acid-acrylate terpolymer.

[0026] The preparation method was the same as in Example 1, wherein the ethylene-methacrylic acid-acrylate terpolymer was first dried in an oven at 50° C. for 2 hours.

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Abstract

The invention discloses a high-barrier nano organic montmorillonite-polyethylene glycol terephthalate composite material and a method for preparing the same. The high-barrier nano organic montmorillonite-polyethylene glycol terephthalate composite material and the method have the advantages that interaction between lamellar nano organic montmorillonite and polyethylene glycol terephthalate matrixes can be improved by the aid of compatilizers, selective distribution of nano inorganic particles can be regulated and controlled, the lamellar nano organic montmorillonite can deform along with deformation of the polyethylene glycol terephthalate matrixes by the aid of dividing-shearing-stretching effects of special flow path structures of a layer multiplier on polyethylene glycol terephthalate melt, and dispersion and the orientation of the nano inorganic particles can be promoted; partial lamellar nano organic montmorillonite can be induced to be concentrated inside the polyethylene glycol terephthalate matrixes by the aid of orientation stretching effects of the layer multiplier, passing paths for small molecules of gas can be lengthened remarkably, and the barrier property of polyethylene glycol terephthalate nano composite materials can be improved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a high-barrier nanometer organic montmorillonite-polyethylene terephthalate composite material and a preparation method thereof. Background technique [0002] Polyethylene terephthalate is widely used in the field of packaging due to its advantages of good transparency, stable chemical properties, relatively good barrier properties, light weight, low price, and recyclability. Barrier property is an important basic performance of packaging materials, and the further improvement of its performance has attracted the attention of the industry. Although polyethylene terephthalate is better than ordinary polymer materials in terms of oxygen barrier and water barrier properties, it still cannot meet some occasions that have special requirements for barrier properties, such as tomato products, cooked foods that are sensitive to trace oxygen, etc. Food, etc. Therefore, improvin...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L51/06C08L23/08C08L101/00C08K9/04C08K3/34B29C47/00B29C47/08B29K67/00
CPCC08L67/02B29C48/022B29C48/267B29K2067/003C08K2201/011C08L51/06C08K9/04C08K3/346C08L23/0869C08L101/00
Inventor 杨照徐国敏孙静秦舒浩于杰韦良强吉玉碧何文涛
Owner GUIZHOU MATERIAL IND TECH INSTITUE
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